Ceiling lamp



FIG. 1 is perspective view of a ceiling lamp;

FIG. 2 is a perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

Broken lines shown in drawings illustrate portions of a ceiling lamp that form no part of a claimed design. 

CLAIM The ornamental design of a ceiling lamp, as shown and described. 